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Only certain rust files were imported via git filter-repo. This adds a Cargo.toml and associated files, such as a README, the license, and a main function. A lot of unused code was deleted also.
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Cameron Martin 2024-01-02 19:07:40 +00:00
parent 0f714ce028
commit 0326853d2f
8 changed files with 1679 additions and 360 deletions
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/target

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Cargo.toml Normal file
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[package]
name = "bazel-lsp"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
anyhow = "1.0.79"
either = "1.9.0"
itertools = "0.12.0"
lsp-types = "0.94.1"
starlark = { git = "https://github.com/facebookexperimental/starlark-rust.git" }
starlark_lsp = { git = "https://github.com/facebookexperimental/starlark-rust.git" }
thiserror = "1.0.56"

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# Bazel LSP
This is a LSP for bazel, based off [starlark-rust](https://github.com/facebookexperimental/starlark-rust).
## Usage
Install the LSP using cargo:
```sh
cargo install bazel-lsp
```
### VSCode
TODO

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src/bazel.rs
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@ -134,25 +134,6 @@ struct FilesystemCompletionOptions {
targets: bool,
}
pub(crate) fn main(
lsp: bool,
print_non_none: bool,
is_interactive: bool,
prelude: &[PathBuf],
) -> anyhow::Result<()> {
if !lsp {
return Err(anyhow::anyhow!("Bazel mode only supports `--lsp`"));
}
// NOTE: Copied from `main.rs`
let mut ctx = BazelContext::new(ContextMode::Check, print_non_none, prelude, is_interactive)?;
ctx.mode = ContextMode::Check;
starlark_lsp::server::stdio_server(ctx)?;
Ok(())
}
pub(crate) struct BazelContext {
pub(crate) workspace_name: Option<String>,
pub(crate) external_output_base: Option<PathBuf>,

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src/eval.rs
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* limitations under the License.
*/
use std::collections::HashMap;
use std::collections::HashSet;
use std::fs;
use std::io;
use std::iter;
use std::path::Path;
use std::path::PathBuf;
use itertools::Either;
use lsp_types::Url;
use starlark::analysis::AstModuleLint;
use starlark::docs::get_registered_starlark_docs;
use starlark::docs::render_docs_as_code;
use starlark::docs::Doc;
use starlark::docs::DocItem;
use starlark::docs::DocModule;
use starlark::environment::FrozenModule;
use starlark::environment::Globals;
use starlark::environment::Module;
use starlark::errors::EvalMessage;
use starlark::eval::Evaluator;
use starlark::syntax::AstModule;
use starlark::syntax::Dialect;
use starlark_lsp::error::eval_message_to_lsp_diagnostic;
use starlark_lsp::server::LspContext;
use starlark_lsp::server::LspEvalResult;
use starlark_lsp::server::LspUrl;
use starlark_lsp::server::StringLiteralResult;
#[derive(Debug)]
pub(crate) enum ContextMode {
@ -50,26 +26,6 @@ pub(crate) enum ContextMode {
Run,
}
#[derive(Debug, thiserror::Error)]
enum ContextError {
/// The provided Url was not absolute and it needs to be.
#[error("Path for URL `{}` was not absolute", .0)]
NotAbsolute(LspUrl),
/// The scheme provided was not correct or supported.
#[error("Url `{}` was expected to be of type `{}`", .1, .0)]
WrongScheme(String, LspUrl),
}
#[derive(Debug)]
pub(crate) struct Context {
pub(crate) mode: ContextMode,
pub(crate) print_non_none: bool,
pub(crate) prelude: Vec<FrozenModule>,
pub(crate) module: Option<Module>,
pub(crate) builtin_docs: HashMap<LspUrl, String>,
pub(crate) builtin_symbols: HashMap<String, LspUrl>,
}
/// The outcome of evaluating (checking, parsing or running) given starlark code.
pub(crate) struct EvalResult<T: Iterator<Item = EvalMessage>> {
/// The diagnostic and error messages from evaluating a given piece of starlark code.
@ -79,303 +35,6 @@ pub(crate) struct EvalResult<T: Iterator<Item = EvalMessage>> {
pub ast: Option<AstModule>,
}
/// Errors when [`LspContext::resolve_load()`] cannot resolve a given path.
#[derive(thiserror::Error, Debug)]
enum ResolveLoadError {
/// Attempted to resolve a relative path, but no current_file_path was provided,
/// so it is not known what to resolve the path against.
#[error("Relative path `{}` provided, but current_file_path could not be determined", .0.display())]
MissingCurrentFilePath(PathBuf),
/// The scheme provided was not correct or supported.
#[error("Url `{}` was expected to be of type `{}`", .1, .0)]
WrongScheme(String, LspUrl),
}
impl Context {
pub(crate) fn new(
mode: ContextMode,
print_non_none: bool,
prelude: &[PathBuf],
module: bool,
) -> anyhow::Result<Self> {
let globals = globals();
let prelude: Vec<_> = prelude
.iter()
.map(|x| {
let env = Module::new();
{
let mut eval = Evaluator::new(&env);
let module = AstModule::parse_file(x, &dialect())
.map_err(starlark::Error::into_anyhow)?;
eval.eval_module(module, &globals)
.map_err(starlark::Error::into_anyhow)?;
}
env.freeze()
})
.collect::<anyhow::Result<_>>()?;
let module = if module {
Some(Self::new_module(&prelude))
} else {
None
};
let mut builtins: HashMap<LspUrl, Vec<Doc>> = HashMap::new();
let mut builtin_symbols: HashMap<String, LspUrl> = HashMap::new();
for doc in get_registered_starlark_docs() {
let uri = Self::url_for_doc(&doc);
builtin_symbols.insert(doc.id.name.clone(), uri.clone());
builtins.entry(uri).or_default().push(doc);
}
let builtin_docs = builtins
.into_iter()
.map(|(u, ds)| (u, render_docs_as_code(&ds)))
.collect();
Ok(Self {
mode,
print_non_none,
prelude,
module,
builtin_docs,
builtin_symbols,
})
}
fn url_for_doc(doc: &Doc) -> LspUrl {
let url = match &doc.item {
DocItem::Module(_) => Url::parse("starlark:/native/builtins.bzl").unwrap(),
DocItem::Object(_) => {
Url::parse(&format!("starlark:/native/builtins/{}.bzl", doc.id.name)).unwrap()
}
DocItem::Function(_) | DocItem::Property(_) => {
Url::parse("starlark:/native/builtins.bzl").unwrap()
}
};
LspUrl::try_from(url).unwrap()
}
fn new_module(prelude: &[FrozenModule]) -> Module {
let module = Module::new();
for p in prelude {
module.import_public_symbols(p);
}
module
}
fn go(&self, file: &str, ast: AstModule) -> EvalResult<impl Iterator<Item = EvalMessage>> {
let mut warnings = Either::Left(iter::empty());
let mut errors = Either::Left(iter::empty());
let final_ast = match self.mode {
ContextMode::Check => {
warnings = Either::Right(self.check(&ast));
Some(ast)
}
ContextMode::Run => {
errors = Either::Right(self.run(file, ast).messages);
None
}
};
EvalResult {
messages: warnings.chain(errors),
ast: final_ast,
}
}
// Convert a result over iterator of EvalMessage, into an iterator of EvalMessage
fn err(
file: &str,
result: starlark::Result<EvalResult<impl Iterator<Item = EvalMessage>>>,
) -> EvalResult<impl Iterator<Item = EvalMessage>> {
match result {
Err(e) => EvalResult {
messages: Either::Left(iter::once(EvalMessage::from_error(Path::new(file), &e))),
ast: None,
},
Ok(res) => EvalResult {
messages: Either::Right(res.messages),
ast: res.ast,
},
}
}
pub(crate) fn expression(
&self,
content: String,
) -> EvalResult<impl Iterator<Item = EvalMessage>> {
let file = "expression";
Self::err(
file,
AstModule::parse(file, content, &dialect())
.map(|module| self.go(file, module))
.map_err(Into::into),
)
}
pub(crate) fn file(&self, file: &Path) -> EvalResult<impl Iterator<Item = EvalMessage>> {
let filename = &file.to_string_lossy();
Self::err(
filename,
fs::read_to_string(file)
.map(|content| self.file_with_contents(filename, content))
.map_err(|e| anyhow::Error::from(e).into()),
)
}
pub(crate) fn file_with_contents(
&self,
filename: &str,
content: String,
) -> EvalResult<impl Iterator<Item = EvalMessage>> {
Self::err(
filename,
AstModule::parse(filename, content, &dialect())
.map(|module| self.go(filename, module))
.map_err(Into::into),
)
}
fn run(&self, file: &str, ast: AstModule) -> EvalResult<impl Iterator<Item = EvalMessage>> {
let new_module;
let module = match self.module.as_ref() {
Some(module) => module,
None => {
new_module = Self::new_module(&self.prelude);
&new_module
}
};
let mut eval = Evaluator::new(module);
eval.enable_terminal_breakpoint_console();
let globals = globals();
Self::err(
file,
eval.eval_module(ast, &globals)
.map(|v| {
if self.print_non_none && !v.is_none() {
println!("{}", v);
}
EvalResult {
messages: iter::empty(),
ast: None,
}
})
.map_err(Into::into),
)
}
fn check(&self, module: &AstModule) -> impl Iterator<Item = EvalMessage> {
let globals = if self.prelude.is_empty() {
None
} else {
let mut globals = HashSet::new();
for modu in &self.prelude {
for name in modu.names() {
globals.insert(name.as_str().to_owned());
}
}
for global_symbol in self.builtin_symbols.keys() {
globals.insert(global_symbol.to_owned());
}
Some(globals)
};
module
.lint(globals.as_ref())
.into_iter()
.map(EvalMessage::from)
}
}
impl LspContext for Context {
fn parse_file_with_contents(&self, uri: &LspUrl, content: String) -> LspEvalResult {
match uri {
LspUrl::File(uri) => {
let EvalResult { messages, ast } =
self.file_with_contents(&uri.to_string_lossy(), content);
LspEvalResult {
diagnostics: messages.map(eval_message_to_lsp_diagnostic).collect(),
ast,
}
}
_ => LspEvalResult::default(),
}
}
fn resolve_load(
&self,
path: &str,
current_file: &LspUrl,
_workspace_root: Option<&Path>,
) -> anyhow::Result<LspUrl> {
let path = PathBuf::from(path);
match current_file {
LspUrl::File(current_file_path) => {
let current_file_dir = current_file_path.parent();
let absolute_path = match (current_file_dir, path.is_absolute()) {
(_, true) => Ok(path),
(Some(current_file_dir), false) => Ok(current_file_dir.join(&path)),
(None, false) => Err(ResolveLoadError::MissingCurrentFilePath(path)),
}?;
Ok(Url::from_file_path(absolute_path).unwrap().try_into()?)
}
_ => Err(
ResolveLoadError::WrongScheme("file://".to_owned(), current_file.clone()).into(),
),
}
}
fn resolve_string_literal(
&self,
literal: &str,
current_file: &LspUrl,
workspace_root: Option<&Path>,
) -> anyhow::Result<Option<StringLiteralResult>> {
self.resolve_load(literal, current_file, workspace_root)
.map(|url| {
Some(StringLiteralResult {
url,
location_finder: None,
})
})
}
fn get_load_contents(&self, uri: &LspUrl) -> anyhow::Result<Option<String>> {
match uri {
LspUrl::File(path) => match path.is_absolute() {
true => match fs::read_to_string(path) {
Ok(contents) => Ok(Some(contents)),
Err(e) if e.kind() == io::ErrorKind::NotFound => Ok(None),
Err(e) => Err(e.into()),
},
false => Err(ContextError::NotAbsolute(uri.clone()).into()),
},
LspUrl::Starlark(_) => Ok(self.builtin_docs.get(uri).cloned()),
_ => Err(ContextError::WrongScheme("file://".to_owned(), uri.clone()).into()),
}
}
fn get_url_for_global_symbol(
&self,
_current_file: &LspUrl,
symbol: &str,
) -> anyhow::Result<Option<LspUrl>> {
Ok(self.builtin_symbols.get(symbol).cloned())
}
fn render_as_load(
&self,
_target: &LspUrl,
_current_file: &LspUrl,
_workspace_root: Option<&Path>,
) -> anyhow::Result<String> {
Err(anyhow::anyhow!("Not yet implemented, render_as_load"))
}
fn get_environment(&self, _uri: &LspUrl) -> DocModule {
DocModule::default()
}
}
pub(crate) fn globals() -> Globals {
Globals::extended_internal()

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src/main.rs Normal file
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@ -0,0 +1,12 @@
mod bazel;
mod eval;
use bazel::BazelContext;
use eval::ContextMode;
fn main() -> anyhow::Result<()> {
let ctx = BazelContext::new(ContextMode::Check, true, &[], true)?;
starlark_lsp::server::stdio_server(ctx)?;
Ok(())
}